Fabrication of Polymer-based Two-dimensional Photonic Crystal for Chemical Sensor Application

Abstract

The stimuli-responsive polymer-based two dimensional photonic crystal (2D-PhC) for chemical sensor application was fabricated using nanoimprint lithography (NIL). The polymer-based 2D-PhC was fabricated using ultraviolet (UV)-curable Poly(dimethyl siloxane) (PDMS) as a base material. By using this polymer-based 2D-PhC, structural color based on Bragg's equation could be observed. In addition, polymer-based 2D-PhC was exposed in hexane vapor, the structural color change (blue to green) due to the swelling of PDMS could be observed in naked eyes. From this result, polymer-based 2D-PhC using PDMS was successfully applied as a cost-effective chemical sensor.